Plug-in electrical instrument



FIG. 1 is a perspective view of a plug-in electrical instrument showing my new design;

FIG. 2 is a top elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side elevational view being a mirror image of FIG. 3;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom elevational view thereof;

FIG. 7 is a perspective view similar to FIG. 1 but of a second embodiment of a plug-in electrical instrument showing my new design;

FIG. 8 is a top elevational view thereof, the left, front, rear and bottom elevational views thereof being the same as the respective FIGS. 3-6, and the right side elevational view being a mirror image of FIG. 3;

FIG. 9 is a perspective view of a third embodiment of a plug-in electrical instrument showing my new design;

FIG. 10 is a top elevational view thereof;

FIG. 11 is a front elevational view thereof;

FIG. 12 is a bottom elevational view thereof, the left and rear elevational views thereof being the same as the respective FIGS. 3 and 5, and the right side elevational view being a mirror image of FIG. 3;

FIG. 13 is a perspective view of a fourth embodiment of a plug-in electrical instrument showing my new design; and,

FIG. 14 is a top elevational view thereof, the left side, front, rear and bottom elevational views thereof being the same as respective FIGS. 3, 11, 5 and 12, and the right side elevational view being a mirror image of FIG. 3. 

The ornamental design for a plug-in electrical instrument, as shown and described. 